EP0440962A2
Expired / Lapsed
EP
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Composition for gelling liquids
Assignee: Becton Dickinson and Co
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Filing: 1990-12-20
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Granted: —
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Expires: 2010-12-20
Abstract
Abstract A gelling composition for an aqueous liquid includes ungellated starch which has been reacted with a silane coupling agent. In preferred compositions, the starch is a starch-polyacrylate graft copolymer and the composition includes a polyacrylate gelling agent. A disinfectant may be added to the composition for compositions intended for use with medical waste.
Inventors
- 👤 Mutlu Karakelle
- 👤 Carl D. Benson
- 👤 Robert A. Taller
- 👤 David E. Spielvogel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/02; C08L51/00; C08L51/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
29 words
A gelling composition for an aqueous liquid comprising a mixture of a first particle of ungellated, silylated starch-polyacrylate graft copolymer and a second particle of a polyacrylate gelling agent.
Claim 2
Dependent Claim
84 words
The composition of Claim 1 wherein said first particle comprises an ungellated particle of a starch-polyacrylate graft copolymer which has been silylated by reaction with a silane coupling agent selected from the group having the structure wherein R is lower alkyl of 1 to 6 carbon atoms, R₁ is lower alkyl of 1 to 3 carbon atoms, R₂ is selected from the group consisting of R₁ and OR₁, and X is selected from the group consisting of OH, OR₁, oxirane, NH₂, Cl and Br.
Claim 3
Dependent Claim
28 words
The composition of Claim 1 wherein the polyacrylate component of said copolymer is selected from the group consisting of a salt of polyacrylic acid, polyacrylamide and mixtures thereof.
Claim 4
Dependent Claim
24 words
The composition of Claim 1 wherein said second particle is selected from the group consisting of a polyacrylic acid salt, polyacrylamide and mixtures thereof.
Claim 5
Dependent Claim
20 words
The composition of Claim 1 wherein said first and second particles have a mesh size of about 20 to 200.
Claim 6
Dependent Claim
11 words
A gelling composition for an aqueous liquid comprising ungellated silylated starch.
Claim 7
Dependent Claim
18 words
The composition of Claim 6 further comprising at least one of a polyacrylate gelling agent and a disinfectant.
Claim 8
Dependent Claim
35 words
A gelling composition for an aqueous liquid comprising a mixture of a first particle of an ungellated, silylated graft copolymer of starch and polyacrylate, a second particle of a polyacrylate gelling agent and a disinfectant.
Claim 9
Dependent Claim
33 words
The composition of Claim 8 wherein the polyacrylate component of the copolymer and said polyacrylate gelling agent are selected from the group consisting of a salt of polyacrylic acid, polyacrylamide and mixtures thereof.
Claim 10
Dependent Claim
21 words
The composition of Claim 8 wherein said disinfectant is selected from the group consisting of calcium hypochlorite, chlorhexidine, hexachlorophene and iodine.
References Cited (Backward Citations)
No citation records indexed.
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